A Hashika Doji is a demonic giant of ancient Japanese folklore that acted as a living embodiment of a measles outbreak.
Depicted as a massive ugly humanoid they were usually male and often depicted as being at war with many other smaller humanoids who embodied the many businesses that faced ruin due to such outbreaks, as such the Hashika Doji can be considered a tool by which society was able to confront the uncertainty of such events as well as parody certain individuals who were seen as profiting from the spread of disease (for example a common theme is a small humanoid representing medicine sellers trying to defend the Hashika Doji from his attackers).